Triphenylmethane dye



- BERG, WINF-RIED HENTRIGH, and VILHELM SGHEPSS, citizens of Germany, residing at 19 .U. S. Letters Patent No. 995,494 and Patented May 4, 1926.

, UNITED STATES.

ENT or Flat WALTER 'DUISBERG, wmrnmn HENTBICH, AND WIL'HELM sonnrss; or wmsnonr: 'oN-THE-mmm, GERMANY, ASSIGNORS,'BY MESNE AssIGNMENrs-ro enAssELLI DYESTUFF CORPORATION, or NEW YORK, N. Y., 'A CORPORATION or nnnawmn.

TRIBHENYLMETHANE DYE.

1T6 Drawing.

To all whom itmay conccra -Be it known that We, WALTER DUIS- Wiesdorf-on-the-Rhine, in the State of Prussia, Germany, have invented new and useful Improvements in Triphenylmethane.

Dyes, of which the following is a specification.

1,065,405 describe the preparation of violet and blue dyestuffs by condensing aniline or paratoluidine with triphenylmethane compounds obtained by the interaction of parachlorbenzaldehyde with ortho-hydroxyaryL carboxylic acids.

We have now found that new and valuabl dyes of the triphenylmetha-ne series can be obtained by condensing .triphenylmethane dyes containing in para-position to the meth ane carbon a substltuent, e. g.,-Cl, "NO

aromatic bases containing a 'substituent in 4.6-dich1oro-2-to1uidine 1-chloro-2-aminonaphthaline, etc.

The new dyes are after being dried and pulverized dark powders of a metallic lustre which are soluble in dilute caustic alkalies generally With-a bluish-red, in dilute alcohol with a reddish-blue coloration, They dye wool generally from bluish-red to reddishviolet shades. -When subsequently chromed they turn into pure red-violet shades. These shades'are-f-ast to milling and potting.

Application filed t me 30,1924.- Seria1No. 723,349.'

By treating ourlnew products-swithv sulfon'ating agents; e. g., with a mixture of monohydrated sulturic acid. andfuming "sulfuric acid containing percent S0, at ordinary temperature until completely soluble in water as described in U. S. Letters Patent No. 1,244,149 they become more soluble and better adapted for printing purposes. The sulfonic acids retain the valuable properties of the initial materials.

border to illustrate the new process more -fully the following example is given, the a parts being by weight 10- parts of the dye obtainable by condens ing ortho-cresotinic acid, with para-chlorobenzaldehyde are slowly heated in an oil bath together with 52 parts of'6'-chlor0-2- tolui'dine- (CH :Cl:NH =1:,6:2)' and 9 parts of its hydrochloride to 120125' G. and kept, at this temperature until the intensity of the red violet colorationdoes no longer increase, The mixture is ;poured.into wat rgit s-r nder k e an theba ;w-hich' h as not enteredinto reactionis drienv f over, with steamy The residue;- isQ-acidulated I with hydrochloric' .acid, ;}fi1tered 1. a and Our new dye is after being driedand pulverized a dark powder soluble in a dilute solution of sodium carbonate with a bluishred, in alcohol with a reddish-blue coloration and in hot sodium acetate solution with a violet-red coloration. ably the formula:

OOOH

and dyes wool a bluish-red turning into a pure red-violet shade by after-chroming.

It has most prob- 26 being after drying and pulverizing, a dark V0 can start from other of the above mentioned dyes of the triphenylmethane series, e. g., from the dye obtained by condensin ortho-cresotinic acid with benzaldehyde an sulfonating the resulting product and from other of the above mentioned aromatic amines.

' \Ve claim 1. The herein described new dyestufl's of the triarylmethane series obtainable by condensing halogenated aromatic bases containing in ortho position to the amino group 9.

substituent', with dyestufis of the triarylmethane-series containing in para position to the methane carbon a. replaceable sub- 2.x The herein described new dyestufi having mostprobably the following formula:

coon c powder soluble in a dilute solution of sodium carbonate with abluish-red and ina-lcohol with a reddish-blue coloration; dyeing wool a bluish-red turning into a ure red-violet by afterchroming, substantia yes described.

:2 a coon o In testimony set our hands.

whereof we have hereunto into 

